{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "discover vulnerability", "arguments": ["discoverer", "vulnerable system owner", "vulnerable system", "capabilities", "supported platform", "vulnerable system version", "time", "vulnerability"]}], "input": "This was confirmed by Trustwave ’s security researcher Manuel Nader , and the VPN provider itself ."}
{"discover vulnerability": [{"discoverer": ["security researcher Manuel Nader", "Trustwave"], "vulnerable system owner": "the VPN provider", "vulnerable system": "NAN", "capabilities": "NAN", "supported platform": "NAN", "vulnerable system version": "NAN", "time": "NAN", "vulnerability": "NAN"}]}